st2064b Sitronix Technology Corporation, st2064b Datasheet - Page 54

• Manufacturer Part Number: st2064b
• Description: 8 Bit Microcontroller With 64k Bytes Rom
• Manufacturer: Sitronix Technology Corporation

Special Notice
Special Notice 1
Special Notice 2
Special Notice 3
Ver. 3.0
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Engineer ____________________
If two keys be pressed at the same time affect LCD display must be
reduced. One resister (47K) should be added between scan line
and keyboard, And selecting the LCD driving strength to maximum
during the keys were pressed.
When LCD is turned off, please disable Keyboard Awaking Pulses
at the same time.
If both the HW debounce and LCD keyboard awaking pulses are
enabled, LCD keyboard awaking pulses must be disabled before
latch Port-A.
ST20P64 has Low Voltage Reset (LVR) function. While the
operation voltage is lower than 1.7V, the reset pin will be short
to GND to act reset automatically. There is no LVR function in
ST2064B.
ST20P64 Operation current is double of ST2064B’ s.
PA0 input range (VIH &VIL) is different from ST20P64’ s.
(ST20P64: 1.25V,0.89V) (ST2064B: 1.66V,1.44V)
In ST20P64, PA0 pull-up resister is smaller than PA1~7, when
the system is operating under 5V.
Do not use 32768HZ as system clock.
(If this code is modified from ST20P64, please keeping eyes on following list.)
(If the LCD keyboard awaking pulses function was turned on)
Confirmed Item
smb4
lda
rmb4
<LCTL
<PA
<LCTL
54/57
Manager ____________________
Check
Note
ST2064B
5/8/09